The Sonett tablets contain minerals and organic constituents which are completely biodegradable. They contain no enzymes, no aggressive chlorinated bleaching agents, no phosphates, and no fragrances. Indicated for all types of household dishwashers except Miele Dishwashers. Only to be used for dishwasher-proof crockery. Not to be used for silverware, lead crystal glass and hand-painted chinaware. Dosage: Crockery with normal level of dirtying: 1 tablet per washing cycle Crockery heavily dirtied: 2 tablets per cycle